Crystal structure of diethyl {2,2,2-tri­chloro-1-[2-(1,3-dioxo-2,3-di­hydro-1H-isoindol-2-yl)-4-methyl­pentanamido]­eth­yl}phospho­nate

In the title phospho­rylated compound, C(20)H(26)Cl(3)N(2)O(6)P, the phthalimide unit is essentially planar (r.m.s. deviation = 0.0129 Å) and the O atoms of this unit deviate from the mean plane by 0.080 (3) and 0.041 (3) Å. In the crystal, pairs of mol­ecules are linked by N—H⋯O and weak C—H⋯O hydrogen bonds involving the same acceptor atom, forming inversion dimers. In addition, π–π stacking inter­actions between the phthalimide groups, with a centroid–centroid distance of 3.7736 (13) Å, and further weak C—H⋯O hydrogen bonds connect the inversion dimers into columns along [0[Image: see text]1].